I don't know why this thing looks so awesome.
Probably because of Ninjas.
I had a similar idea recently while looking at my Swarmyard. Nicely done. I bet Aboshan is quite a house when you get down to 1vs1.
I really have liked him when he's come out, but he's not quite a house. Even with 1 on 1, there's generally still a lot of mass removal, which is hard on strategies that like multiple creatures in play. Still, Aboshan is playable by himself or one other "cephalid" in play.
The deck naturally has a low mana curve, so it does do a lot better in 1v1, team or Pentagram games. I have not tried it in FFA, but I suspect it would be horribly outmatched unless everyone left it alone until the end.